KR20210144624A - Camera module - Google Patents

Abstract

According to an embodiment of the present invention, a camera module comprises: a housing; a lens module provided at an inner space of the housing to be movable in an optical axis direction and provided with at least one lens; a magnet provided in the lens module; and a location detecting sensor sensing a location of the magnet. A plurality of location detecting sensors may be provided so that at least one of the sensors face different polarities of the magnet respectively.

Description

camera module

The present invention relates to a camera module.

In recent years, cameras are basically adopted in portable electronic devices such as smartphones, tablet PCs, and laptops, and cameras for mobile terminals are equipped with autofocus (AF), image stabilization (OIS), and zoom (Zoom) functions. is being added

However, there is a problem in that the structure of the camera module is complicated and the size is increased in order to implement various functions, so that the size of the portable electronic device on which the camera module is mounted is increased.

In addition, when the lens or image sensor is directly moved to compensate for hand shake, both the weight of the lens or image sensor itself and the weight of other members to which the lens or image sensor is attached must be considered. , there is a problem in that power consumption becomes severe.

In addition, in order to implement the auto focus function (AF) and the zoom function (Zoom), a distance of a predetermined length or more must be secured so that the lens can move in the optical axis direction. .

It is an object of the present invention to provide a camera module that has a simple structure and can reduce the size while implementing functions such as auto focus adjustment, zoom, and hand shake correction.

In addition, an object of the present invention is to provide a camera module in which a plurality of groups of lenses can be easily aligned in an optical axis direction even if a plurality of groups of lenses are provided in order to implement a zoom function.

In addition, it is intended to provide a stopper or a damper so that both the zoom lens and the reflection module do not deviate from the optimal position.

In addition, in order to maximize the performance of the zoom lens, the movement position of the zoom lens is measured as accurately as possible by a plurality of hall sensors.

A camera module according to an embodiment of the present invention includes: a housing; a lens module provided in the inner space of the housing, movable in the optical axis direction, and having at least one lens; a magnet provided in the lens module; and a position sensing sensor for sensing the position of the magnet, wherein the position sensing sensor may be provided in plurality such that at least one of the magnets faces each other with different polarities.

A camera module according to another embodiment of the present invention includes a housing; a lens module provided in the inner space of the housing, movable in the optical axis direction, and having at least one lens; a magnet provided in the lens module; and a position detection sensor for sensing the position of the magnet, wherein the magnet has an N pole and an S pole alternately disposed in the optical axis direction, and the position detection sensor is at least one with the same polarity at different positions of the magnet. may be provided in plurality so as to face each other.

The camera module according to an embodiment of the present invention has a simple structure and can reduce the size while implementing functions such as auto focus adjustment, zoom, and hand shake correction. In addition, power consumption can be minimized.

Furthermore, in the present invention, even if a plurality of lens groups are provided to implement a zoom function, alignment in the optical axis direction can be easily implemented.

In addition, a stopper or a damper may be provided so that both the zoom lens and the reflection module do not deviate from the optimal position.

In addition, in order to maximize the performance of the zoom lens, the movement position of the zoom lens can be measured as accurately as possible by a plurality of hall sensors.

1 is a perspective view of a portable electronic device according to an embodiment of the present invention;
2 is a perspective view of a camera module according to an embodiment of the present invention;
3A and 3B are cross-sectional views of a camera module according to an embodiment of the present invention;
4 is an exploded perspective view of a camera module according to an embodiment of the present invention;
5 is a perspective view of a housing of a camera module according to an embodiment of the present invention;
6A is a perspective view in which a reflection module and a lens module are coupled to the housing of the camera module according to an embodiment of the present invention;
6B is a perspective view in which a reflection module and a lens module are coupled to the housing of the camera module according to another embodiment of the present invention;
7 is a perspective view in which a driving coil and a substrate on which a sensor is mounted are coupled to a housing of a camera module according to an embodiment of the present invention;
8A is an exploded perspective view of a rotating plate and a rotating holder of a camera module according to an embodiment of the present invention;
8B is an exploded perspective view of a rotating plate and a rotating holder of a camera module according to another embodiment of the present invention;
9A is an exploded perspective view of a housing and a rotating holder in a camera module according to an embodiment of the present invention;
Figure 9b is an exploded perspective view of the housing and the rotating holder in the camera module according to another embodiment of the present invention,
10 is an exploded perspective view of a housing and a lens barrel according to an embodiment of the present invention;
11 is a perspective view illustrating a state in which a damper of a rotating holder and a stopper of a zoom lens are installed according to an embodiment of the present invention;
12 is an exploded perspective view in which the damper of the rotating holder and the stopper of the zoom lens are disassembled in FIG. 11;
13A is a perspective view illustrating another embodiment of a guide groove for moving a zoom lens provided in a housing according to an embodiment of the present invention;
13B is a reference view showing the shape in which the zoom lens is installed in FIG. 13A;
14 is a reference diagram for explaining an embodiment of a structure in which one of the zoom lenses according to an embodiment of the present invention is precisely fixed at a predetermined position;
15 and 16 are reference views for explaining another embodiment of a structure in which one of the zoom lenses according to an embodiment of the present invention is precisely fixed at a predetermined position;
17A is a view showing a positional relationship between a magnet and four hall sensors provided in a lens barrel according to an embodiment of the present invention;
17B is a graph showing the sensing values of the four Hall sensors according to the movement of the lens barrel in the positional relationship shown in FIG. 17A;
18A and 19A are views showing another embodiment in which only the number of Hall sensors is changed in the positional relationship shown in FIG. 17A;
18B and 19B are graphs showing the sensing values of the Hall sensor according to the movement of the lens barrel in the positional relationship of the other embodiments shown in FIGS. 18A and 19A;
20A is a view showing a positional relationship between a magnet and four hall sensors provided in a lens barrel according to another embodiment of the present invention;
20B is a graph showing the sensing values of the four Hall sensors according to the movement of the lens barrel in the positional relationship shown in FIG. 20A;
21A is a view showing another embodiment in which only the number of Hall sensors is changed in the positional relationship shown in FIG. 20A;
21B is a graph showing the sensing values of six Hall sensors according to the movement of the lens barrel in the positional relationship shown in FIG. 21A;
22 is a perspective view showing a main board and coils and components mounted thereon according to an embodiment of the present invention;
23 is a perspective view of a portable electronic device according to another embodiment of the present invention.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. However, the spirit of the present invention is not limited to the presented embodiment.

For example, those skilled in the art who understand the spirit of the present invention will be able to propose other embodiments included within the scope of the present invention through addition, change, or deletion of components, but this is also the spirit of the present invention. will be considered to be within the scope.

1 is a perspective view of a portable electronic device according to an embodiment of the present invention.

Referring to FIG. 1 , a portable electronic device 1 according to an embodiment of the present invention may be a portable electronic device such as a mobile communication terminal equipped with a camera module 1000 , a smart phone, or a tablet PC.

As shown in FIG. 1 , the portable electronic device 1 is equipped with a camera module 1000 to photograph a subject.

In this embodiment, the camera module 1000 includes a plurality of lenses, and the optical axis (Z axis) of the lenses is in the thickness direction (Y axis direction, the front surface of the portable electronic device) of the portable electronic device 1 . It can be oriented in a direction perpendicular to the rear surface (direction facing the rear surface or the opposite direction).

For example, the optical axis (Z axis) of the plurality of lenses provided in the camera module 1000 may be formed in the width direction or the length direction of the portable electronic device 1 .

Accordingly, even if the camera module 1000 has functions such as Auto Focusing (hereinafter, AF), Zoom, and Optical Image Stabilizing (hereinafter, OIS), the thickness of the portable electronic device 1 increases. you can avoid doing it. Accordingly, it is possible to reduce the thickness of the portable electronic device 1 .

The camera module 1000 according to an embodiment of the present invention may have AF, Zoom, and OIS functions.

Since the camera module 1000 having AF, Zoom, and OIS functions, etc. must be provided with various parts, the size of the camera module increases as compared to a general camera module.

If the size of the camera module 1000 is increased, there may be a problem in miniaturization of the portable electronic device 1 in which the camera module 1000 is mounted.

For example, in the camera module, the number of laminated lenses increases for the zoom function, and when a plurality of laminated lenses are formed in the thickness direction of the portable electronic device, the thickness of the portable electronic device increases according to the number of stacked lenses. do. Accordingly, if the thickness of the portable electronic device is not increased, the number of laminated lenses cannot be sufficiently secured, and the zoom performance is weakened.

In addition, in order to implement AF, Zoom and OIS functions, it is necessary to install an actuator that moves a plurality of lens groups in the optical axis direction or in a direction perpendicular to the optical axis. When formed in the direction, the actuator for moving the lens group must also be installed in the thickness direction of the portable electronic device. Accordingly, the thickness of the portable electronic device is increased.

However, in the camera module 1000 according to an embodiment of the present invention, since the optical axis (Z axis) of the plurality of lenses is disposed perpendicular to the thickness direction of the portable electronic device 1 , the camera module 1000 having AF, Zoom and OIS functions is provided. Even if the camera module 1000 is mounted, the portable electronic device 1 can be thinned.

2 is a perspective view of a camera module according to an embodiment of the present invention, FIGS. 3A and 3B are cross-sectional views of a camera module according to an embodiment of the present invention, and FIG. 4 is a camera module according to an embodiment of the present invention. is an exploded perspective view of

2 to 4 , the camera module 1000 according to an embodiment of the present invention includes a reflection module 1100, a lens module 1200, and an image sensor module 1300 provided in a housing 1010. do.

The reflection module 1100 is configured to change the traveling direction of light. For example, the light incident through the opening 1031 of the cover 1030 that covers the camera module 1000 from the top may change the traveling direction so as to be directed toward the lens module 1200 through the reflection module 1100 . To this end, the reflective module 1100 may include a reflective member 1110 that reflects light.

For example, the path of the light incident in the thickness direction (Y-axis direction) of the camera module 1000 is changed to approximately coincide with the optical axis (Z-axis) direction by the reflection module 1100 .

The lens module 1200 includes a plurality of lenses through which the light whose traveling direction is changed by the reflection module 1100 passes. In addition, the lens module 1200 includes at least three lens barrels 1210 , 1220 , and 1230 . An autofocus (AF) and a zoom function (Zoom) may be implemented according to the movement of the at least three lens barrels 1210 , 1220 , and 1230 in the optical axis direction (Z axis). In addition, in this embodiment, any one 1230 of at least three lens barrels 1210 , 1220 , 1230 may be fixed so as not to move in the optical axis direction, and the fixed lens barrel 1230 and the remaining two lens barrels An autofocus (AF) and a zoom function (Zoom) may be implemented by 1210 and 1220 .

The image sensor module 1300 includes an image sensor 1310 that converts light passing through a plurality of lenses into electrical signals, and a printed circuit board 1320 on which the image sensor 1310 is mounted. In addition, the image sensor module 1300 may include an optical filter 1340 that filters light incident through the lens module 1200 . The optical filter 1340 may be an infrared cut filter.

In the inner space of the housing 1010 , the reflection module 1100 is provided in front of the lens module 1200 as the center, and the image sensor module 1300 is provided in the rear of the lens module 1200 .

2 to 22 , the camera module 1000 according to an embodiment of the present invention includes a reflection module 1100, a lens module 1200, and an image sensor module 1300 provided in a housing 1010. do.

A reflection module 1100 , a lens module 1200 , and an image sensor module 1300 are sequentially provided inside the housing 1010 from one side to the other side. Of course, the housing 1010 has an internal space in which the reflection module 1100, the lens module 1200, and the image sensor module 1300 are interpolated (here, the printed circuit board 1320 having the image sensor module 1300) ) may be attached to the outside of the housing 1010).

For example, as shown in the drawing, the housing 1010 may be integrally provided so that both the reflection module 1100 and the lens module 1200 are interpolated into the inner space. However, the present invention is not limited thereto, and for example, separate housings for interpolating the reflection module 1100 and the lens module 1200 may be interconnected.

And, the housing 1010 is covered by the cover 1030 so that the inner space is not visible.

The cover 1030 has an opening 1031 through which light is incident, and the light incident through the opening 1031 is changed in a traveling direction by the reflection module 1100 and is incident on the lens module 1200 . The cover 1030 may be provided integrally to cover the entire housing 1010 , or may be provided as separate members covering the reflection module 1100 and the lens module 1200 , respectively.

The reflection module 1100 includes a reflection member 1110 that reflects light. Then, the light incident to the lens module 1200 passes through a plurality of lens groups (at least three lens barrels 1210, 1220. 1230), and then is converted into an electrical signal by the image sensor 1310 and stored.

The housing 1010 includes a reflection module 1100 and a lens module 1200 in an internal space. In addition, the reflective module 1100 may be provided on the front side of the inner space of the housing 1010 and the lens module 1200 may be provided on the rear side. In addition, the space in which the lens module 1200 is provided may be separated from each other by the protruding wall 1009 . The protruding wall 1007 may be provided in a shape protruding from both sides into the inner space from the side wall of the housing 1010 .

In the case of the reflective module 1100 provided on the front side, the rotating holder 1120 by the attractive force of the pulling yoke 1153 provided on the inner wall surface of the housing 1010 and the pulling magnet 1151 provided on the rotating holder 1120 . ) is closely supported on the inner wall surface of the housing 1010 . Here, although not shown in the drawings, a pulling magnet may be provided in the housing 1010 and a pulling yoke may be provided in the rotating folder 1120 . Hereinafter, for convenience of description, the structure shown in the drawings will be described.

A first ball bearing 1131 , a rotating plate 1130 , and a second ball bearing 1133 are provided between the inner wall surface of the housing 1010 and the rotating holder 1120 .

And, as will be described in detail below, the first ball bearing 1131 and the second ball bearing 1133 are partially inserted into the guide grooves 1132, 1133, 1021, 1121 and are in close contact with the rotating holder 1120 and the rotating plate 1130 in the housing ( When inserting into the inner space of 1010, some space is required between the rotating holder 1120 and the protruding wall 1007, and after the rotating holder 1120 is mounted on the housing 1010, the pulling yoke and the pulling Since the rotating holder 1120 is in close contact with the inner wall surface of the housing 1010 by the attractive force of the magnet, a small space is left between the rotating holder 1120 and the third lens barrel 1230 .

Accordingly, in the present embodiment, a damper 1050 fitted to the upper portion of the housing 1010 while supporting the rotation holder 1120 may be provided (of course, even if there is no damper 1050, the pulling magnet 1151 and the pulling yoke ( 1153)).

The damper 1050 includes a frame 1051 fitted on an upper portion of the housing 1010 , and a locking portion 1055 and an extension portion 1052 extending downward from the frame 1051 in the optical axis direction. In addition, the extension portion 1052 may be provided with a damping material 1053 to protrude in the direction of the rotation holder 1120 along the optical axis direction. The damping material 1053 may be provided to be fitted into the through hole provided in the extension portion 1052, and the damping material 1053 may be any material as long as it has elasticity, such as urethane, silicone, epoxy, or poly material. do.

The locking part 1055 is caught as if it is fitted to the outside of the housing 1010 . In addition, the housing is provided with an insertion groove 1019 into which the frame 1051 and the extension 1052 are fitted. The insertion groove 1019 includes a first insertion groove 1019a provided along the inner side of the upper rim of the housing 1010, and a second insertion extending downward perpendicular to the optical axis direction from the other end of the first insertion groove 1019a. It may include a groove 1019b and a third insertion groove 1019c provided along the outside of the housing 1010 at one end of the first insertion groove 1019a.

Then, the frame 1051 is fitted into the first insertion groove 1019a, and the locking part 1055 provided at one end of the frame 1051 is fitted to the outside of the housing 1010 and the other side of the frame 1051 . Since the extension 1052 provided at the end may be fitted into the second insertion groove 1019b, the frame 1051 may be firmly fixed so as not to move in the optical axis direction. In addition, an adhesive may be applied between the frame 1051 and the housing 1010 to be further bonded.

On the other hand, the damping material 1053 may be provided to be fitted into a through hole provided in the extension portion 1052 (of course, the damping material 1053 is attached to one or both surfaces of the extension portion 1052 by bonding using an adhesive. may be), the damping material 1053 may be provided to protrude from both sides of the extension portion 1052 . In addition, the damping material 1053 can serve as a damper for absorbing the impact of the rotating holder 1120 or a stopper for limiting the moving distance, as well as an embodiment in which the third lens barrel 1230 is fixed (FIG. 6b) may serve to support the third lens barrel 1230 from one side in the optical axis direction.

The damper 1050 may serve as a bracket for supporting the rotation holder 1120 when the reflection module 1100 is not driven, and when the reflection module 1100 is driven, an additional rotation holder 1120 . It can act as a damper or stopper to control the movement of Of course, a space may be provided between the damper 1050 and the rotation holder 1120 so that rotation of the rotation holder 1120 is smooth. Alternatively, even when the damper 1050 is in contact with the rotating holder 1120, the rotating holder 1120 can be smoothly moved while supported by the damper 1050 by providing the elastic damping material 1053. .

In addition, the housing 1010 is provided with a first driving unit 1140 and a second driving unit 1240 for driving the reflective module 1100 and the lens module 1200, respectively. The first driving unit 1140 includes a plurality of coils 1141b, 1143b, and 1145b for driving the reflection module 1100, and the second driving unit 1240 is provided with a plurality of lens modules 1200 - the first Includes a plurality of coils (1241b, 1243b, 1245b) for driving the lens barrel (1210), the second lens barrel (1220), and the third lens barrel (1230).

And, since the plurality of coils 1141b, 1143b, 1145b, 1241b, 1243b, and 1245b are provided in the housing 1010 in a state mounted on the main board 1070, the housing 1010 includes the plurality of coils 1141b, 1143b, A plurality of through holes 1010a, 1010b, 1010c, 1010d, 1010e, 1010f, and 1010g may be provided so that 1145b, 1241b, 1243b, and 1245b are exposed to the inner space of the housing 1010 .

Here, the main board 1070 on which the plurality of coils 1141b, 1143b, 1145b, 1241b, 1243b, and 1245b are mounted may be integrally connected as shown in the drawing. In this case, since only one terminal is provided, external power and signal connection may be facilitated. However, the present invention is not limited thereto, and the main substrate 1070 may be provided with a plurality of substrates, for example, by separating the substrate on which the coil for the reflection module 1100 is mounted and the substrate on which the coil for the lens module 1200 is mounted. may be

The reflection module 1100 may change the path of the light incident through the opening 1031 . When taking an image or video, the image may be blurred or the video may be shaken due to the user's hand shake. can For example, when shaking occurs during image shooting or video recording due to a user's hand shake, the shaking is compensated by imparting a relative displacement corresponding to the shaking to the rotation holder 1120 .

In addition, since the present embodiment does not include a lens and the like, the OIS function is implemented by the movement of the relatively light rotating holder 1120 , so power consumption can be minimized.

That is, in this embodiment, the rotation holder 1120 provided with the reflection member 1110 without moving the lens barrel or the image sensor provided with a plurality of lenses in order to implement the OIS (Optical Image Stabilizer) function. to change the traveling direction of the light, so that the light having the hand shake and the like corrected is incident on the lens module 1200 .

The reflection module 1100 includes a rotation holder 1020 provided to be supported by the housing 1010 , a reflection member 1110 mounted on the rotation holder 1020 , and a first driving unit 1140 for moving the rotation holder 1120 . includes

The reflective member 1110 may change the propagation direction of light. For example, the reflective member 1110 may be a mirror or a prism that reflects light (for convenience of explanation, in the drawings related to an embodiment, the reflective member 1110 is shown as a prism) ).

The reflective member 1110 is fixed to the rotation holder 1120 . The rotation holder 1120 is provided with a mounting surface 1123 on which the reflective member 1110 is mounted.

The mounting surface 1123 of the rotating holder 1120 may be configured as an inclined surface so that the path of the light is changed. For example, the mounting surface 1123 may be an inclined surface inclined by 30 to 60 degrees with respect to the optical axis (Z axis) of the plurality of lenses. In addition, the inclined surface of the rotation holder 1120 may face the opening 1031 of the cover 1030 through which light is incident.

The rotating holder 1120 on which the reflective member 1110 is mounted is movably accommodated in the inner space of the housing 1010 . For example, the rotation holder 1120 may be accommodated in the housing 1010 to be rotatably movably based on the first axis (X axis) and the second axis (Y axis). Here, the first axis (X axis) and the second axis (Y axis) may mean an axis perpendicular to the optical axis (Z axis), and the first axis (X axis) and the second axis (Y axis) are mutually perpendicular. It can be one axis.

The rotation holder 1120 includes a first ball bearing 1131 and a second axis aligned along the first axis (X axis) so that rotational movement is smooth based on the first axis (X axis) and the second axis (Y axis). It is supported by the housing 1010 by the second ball bearing 1133 aligned along the (Y-axis). In the drawings, as an example, two first ball bearings 1131 aligned along a first axis (X-axis) and two second ball bearings 1133 aligned along a second axis (Y-axis) are disclosed. In addition, rotational motion may be performed based on the first axis (X axis) and the second axis (Y axis) by the first driving unit 1140 to be described below.

In addition, the first ball bearing 1131 and the second ball bearing 1133 are provided on the front and rear surfaces of the rotary plate 1130, respectively (or the first ball bearing 1131 and the second ball bearing 1133 are the opposite of the rotary plate 1130) It is also possible to be provided by changing positions on the rear and front surfaces, that is, the first ball bearing 1131 may be aligned along the second axis (Y axis), and the second ball bearing 1133 may be aligned along the first axis (X axis), Hereinafter, for convenience of explanation, the structure shown in the drawings) and the rotating plate 1130 may be provided between the rotating holder 1120 and the inner surface of the housing 1010 .

And, by the attraction of the pulling magnet 1151 - or the pulling yoke - provided in the rotating holder 1120 - and the pulling yoke 1153 - or the pulling magnet provided in the housing 1010 - the rotating holder 1120 is the rotating plate ( 1130) may be supported on the housing 1010 (of course, the first ball bearing 1131 and the second ball bearing 1133 are also provided between the rotating holder 1120 and the housing 1010).

Guide grooves 1132 and 1134 may be provided on the front and rear surfaces of the rotary plate 1130 so that the first ball bearing 1131 and the second ball bearing 1133 are inserted, and the guide grooves 1132 and 1134 include the first ball bearing ( A first guide groove 1132 into which the 1131 is partially inserted and a second guide groove 1134 into which the second ball bearing 1133 is partially inserted may be included.

In addition, a third guide groove 1021 may be provided in the housing 1010 to partially insert the first ball bearing 1131 , and a fourth guide groove to partially insert the second ball bearing 1133 into the rotating holder 1120 . 1121 may be provided.

The first guide groove 1132 , the second guide groove 1134 , the third guide groove 1021 , and the fourth guide groove 1121 described above rotates the first ball bearing 1131 and the second ball bearing 1133 . To facilitate this, it may be provided in the shape of a hemisphere or polygonal (polygonal pole or polygonal pyramid) groove.

The first ball bearing 1131 and the second ball bearing 1133 may roll in the first guide groove 1132 , the second guide groove 1134 , the third guide groove 1021 , and the fourth guide groove 1121 , or It can act as a bearing while sliding.

Meanwhile, as shown in FIGS. 8B and 9B , the first ball bearing 1131a and the second ball bearing 1133a may be fixedly provided on both surfaces of the rotating plate 1130 , respectively.

However, the present invention is not limited thereto, and the first ball bearing 1131a and the second ball bearing 1133a may have a structure fixed to at least one of the housing 1010 , the rotating plate 1130 , and the rotating holder 1120 . For example, the first ball bearing 1131a may be fixedly provided to the housing 1010 or the rotating plate 1130 , and the second ball bearing 1133a may be fixedly provided to the rotating plate 1130 or the rotating holder 1120 . In this case, the guide groove may be provided only on the member opposite to the member on which the first ball bearing 1131 or the second ball bearing 1133 is fixedly provided. can be done

The first ball bearing 1131 and the second ball bearing 1133 may be separately manufactured and attached to any one of the housing 1010 , the rotating plate 1130 , and the rotating holder 1120 . Alternatively, the first ball bearing 1131 and the second ball bearing 1133 may be integrally provided when the housing 1010 , the rotating plate 1130 , and the rotating holder 1120 are manufactured.

The first driving unit 1140 generates a driving force so that the rotating holder 1120 is rotatable based on two axes.

For example, the first driving unit 1140 may include a plurality of magnets 1141a, 1143a, and 1145a and a plurality of coils 1141b, 1143b, and 1145b disposed to face the plurality of magnets 1141a, 1143a, and 1145a. have.

When power is applied to the plurality of coils 1141b, 1143b, and 1145b, the plurality of magnets 1141a, 1141a, The rotation holder 1120 to which 1143a and 1145a is mounted may be rotated based on a first axis (X-axis) and a second axis (Y-axis).

A plurality of magnets (1141a, 1143a, 1145a) is mounted on the rotating holder (1120). For example, some 1141a of the plurality of magnets 1141a, 1143a, 1145a are mounted on the lower surface of the rotating holder 1120, and the remaining 1143a, 1145a may be mounted on the side of the rotating holder 1120. .

The plurality of coils 1141b, 1143b, and 1145b are mounted on the housing 1010 . For example, the plurality of coils 1141b, 1143b, and 1145b may be mounted on the housing 1010 via the main board 1070 . That is, the plurality of coils 1141b, 1143b, and 1145b are provided on the main board 1070 , and the main board 1070 is mounted on the housing 1010 .

Here, in the drawing, the main board 1070 shows an example in which the coil for the reflection module 1100 and the coil for the lens module 1200 are all mounted as one body, but the main board 1070 is the reflection module 1100. The coil and the coil for the lens module 1200 may be separately provided in two or more substrates to be mounted respectively.

In this embodiment, when rotating the rotating holder 1120, a closed-loop control method of sensing and feeding back the position of the rotating holder 1120 is used.

Accordingly, position sensors 1141c and 1143c are required for closed-loop control. The position sensors 1141c and 1143c may be Hall sensors.

The position sensors 1141c and 1143c are disposed inside or outside each coil 1141b and 1143b, and the position sensors 1141c and 1143c can be mounted on the main board 1070 on which the respective coils 1141b and 1143b are mounted. have.

On the other hand, the main board 1070 may be provided with a gyro sensor (not shown) that detects a shaking factor such as a user's hand shake, and a driving circuit element ( Driver IC (not shown) may be provided.

When the rotating holder 1120 rotates about the first axis (X axis), the rotating plate 1130 is rotated while riding on the first ball bearing 1131 in which the ball bearings are arranged along the first axis (X axis). 1120 is rotated at the same time (in this case, the rotation holder 1120 does not move relative to the rotation plate 1130).

In addition, when the rotating holder 1120 rotates about the second axis (Y axis), the rotating holder 1120 is rotated on the second ball bearing 1133 in which the ball bearings are arranged along the second axis (Y axis). (In this case, since the rotating plate 1130 does not rotate, the rotating holder 1120 moves relative to the rotating plate 1130).

That is, when rotating based on the first axis (X axis), the first ball bearing 1131 acts, and when rotating based on the second axis (Y axis), the second ball bearing 1133 acts. As shown in the figure, when rotating about the first axis (X axis), the second ball bearing 1133 aligned with respect to the second axis (Y axis) cannot move while being fitted in the guide groove. This is because, when rotating based on the second axis (Y axis), the first ball bearing 1131 aligned with respect to the first axis (X axis) has a structure that cannot be moved while being fitted in the guide groove.

Light reflected from the reflection module 1100 may be incident on the lens module 1200 . And, the incident light is autofocus (AF) or zoom (Zoom) function is implemented by the optical axis direction (Z axis) movement of at least three lens barrels 1210, 1220, 1230 provided in the lens module 1200. can

* Referring to the embodiment shown in FIG. 6A , for example, two lens barrels 1210 and 1220 at the rear are in charge of a zoom function, and one lens barrel 1230 in the front thereof can be in charge of an autofocus function. have. Of course, the present invention is not limited thereto, and the three lens barrels 1210 , 1220 , and 1230 may divide or overlap the zoom function and the autofocus function by various combinations.

Of course, in addition, various deformation control is possible. For example, referring to the embodiment shown in FIG. 6B , the two lens barrels 1210 and 1220 at the rear are each divided or overlapped and in charge of a zoom function or an autofocus function - for example, two lens barrels 1210, 1220) is combined to take charge of the zoom function, and the rearmost lens barrel 1210 is additionally responsible for the autofocus function, and one lens barrel 1230 in the front is fixed to the housing 1010. can keep Furthermore, although not shown, any one of the three lens barrels 1210 , 1220 , and 1230 maintains a state fixed to the housing 1010 , and the remaining two lens barrels are divided or overlapped to each other for zoom function or autofocus. function can be assumed. In this case, the lens barrel (eg, 1230 ) fixed to the housing 1010 is used for purposes other than bearings, such as a driving magnet or a ball bearing interposed between a coil opposing it and the housing 1010 , or is unnecessary. can do.

In addition, in the drawings related to this embodiment, the space provided with one lens barrel 1230 at the front and two lens barrels 1210 and 1220 at the rear is partitioned by the protruding wall 1009, but is not limited thereto. and the three lens barrels 1210 , 1220 , and 1230 may all be provided in the same space or may be provided in different partitioned spaces.

The plurality of stacked lens groups provided in the lens module 1200 may be divided into at least three lens barrels 1210 , 1220 , and 1230 , respectively. In addition, although the plurality of stacked lens groups are provided in at least three lens barrels 1210 , 1220 , and 1230 , the optical axis is aligned with the Z-axis, which is the direction in which light is emitted from the reflection module 1100 .

The lens module 1200 includes a second driving unit 1240 to implement autofocus (AF) and zoom (Zoom) functions.

The lens module 1200 includes at least three lens barrels movably provided in the inner space of the housing 1010 in the optical axis (Z axis) direction - a first lens barrel 1210 , a second lens barrel 1220 and a third The lens barrel 1230 - is provided. In addition, a second driving unit 1240 for moving the three lens barrels 1210 , 1220 , and 1230 in the optical axis (Z axis) direction with respect to the housing 1010 is included.

The first to third lens barrels 1210 , 1220 , and 1230 are configured to move approximately in the optical axis (Z axis) direction to implement an autofocus (AF) or zoom function.

Accordingly, the second driver 1240 generates a driving force so that the first to third lens barrels 1210 , 1220 , and 1230 are movable in the optical axis (Z axis) direction, respectively. That is, the second driving unit 1240 individually moves the first to third lens barrels 1210 , 1220 , and 1230 in the optical axis (Z axis) direction to implement an autofocus (AF) or zoom function. .

The first to third lens modules 1210 , 1220 , and 1230 may be provided to be supported on the bottom surface of the housing 1010 . For example, all of the first to third lens barrels 1210 , 1220 , and 1230 may be individually supported on the bottom surface of the housing 1010 via a ball bearing. Hereinafter, an embodiment in which the first to third lens barrels 1210 , 1220 , and 1230 are respectively supported on the bottom surface of the housing 1010 via a ball bearing will be mainly described.

For example, the second driving unit 1240 includes a plurality of magnets 1241a, 1243a, and 1245a and a plurality of coils 1241b, 1243b, and 1245b disposed to face the plurality of magnets 1241a, 1243a, and 1245a.

When power is applied to the plurality of coils 1241b, 1243b, and 1245b, the plurality of magnets 1241a, 1241a, The first to third lens barrels 1210 , 1220 , and 1230 mounted separately from 1243a and 1245a may be moved in the optical axis (Z axis) direction, respectively.

The plurality of magnets 1241a , 1243a , and 1245a are divided and mounted on the first to third lens barrels 1210 , 1220 , and 1230 . For example, the first magnet 1241a is on the side of the first lens barrel 1210 , the second magnet 1243a is on the side of the second lens barrel 1220 , and the third magnet 1245a is on the third lens barrel It can be mounted on the side of the 1210.

The plurality of coils 1241b, 1243b, and 1245b are mounted on the housing 1010 to face the plurality of magnets 1241a, 1243a, and 1245a, respectively. Here, since the plurality of magnets 1241a , 1243a , 1245a provided in the first to third lens barrels 1210 , 1220 , 1230 are respectively divided into both side surfaces, the plurality of coils 1241b , 1243b and 1245b are also provided, respectively. It may be provided on both sidewalls of the housing 1010 to face each other.

For example, the plurality of coils 1241b, 1243b, and 1245b are mounted on the main board 1070 , and the main board 1070 may be mounted on the housing 1010 .

In this embodiment, when the first to third lens barrels 1210, 1220, and 1230 are moved, a closed-loop control method in which the positions of the first to third lens barrels 1210, 1220, and 1230 are sensed and fed back is used. do. Accordingly, the position sensors 1241c, 1243c, and 1245c are required for closed-loop control. The position sensors 1241c, 1243c, and 1245c may be Hall sensors.

The position sensors 1241c, 1243c, 1245c are disposed inside or outside the coils 1241b, 1243b, 1245b, and the position sensors 1241c, 1243c, 1245c) may be installed.

Meanwhile, in the drawings, the first lens barrel 1210 and the second lens barrel 1220 are illustrated to be driven by a pair of coils and magnets, and in this case, coils and magnets may be provided on either side. In this case, the size of the coil and the magnet may be somewhat increased in order to strengthen the driving force, and in this case, a plurality of position sensors 1241c and 1243c may be provided in order to accurately sense the position. In the drawings, it is presented as an example that three position sensors 1241c and 1243c are provided inside the coils 1241b and 1243b for driving the first lens barrel 1210 and the second lens barrel 1220, respectively. This is to provide a sufficient number of Hall sensors to sense an accurate position since the first lens barrel 1210 and the second lens barrel 1220 move a considerable distance in the optical axis direction for zoom implementation.

The first lens barrel 1210 is provided in the housing 1010 to be movable in the optical axis (Z axis) direction. For example, a plurality of third ball bearings 1215 are disposed between the first lens barrel 1210 and the bottom surface of the housing 1010 .

The plurality of third ball bearings 1215 serve as bearings for guiding the movement of the first lens barrel 1210 in the process of implementing the autofocus (AF) or zoom function.

The plurality of third ball bearings 1215 are configured to roll in the optical axis (Z axis) direction when a driving force for moving the first lens barrel 1210 in the optical axis (Z axis) direction is generated. Accordingly, the plurality of third ball bearings 1215 guide the movement of the first lens barrel 1210 in the optical axis (Z axis) direction.

A plurality of guide grooves 1214 and 1013 for accommodating the third ball bearing 1215, respectively, are formed on the bottom surface of the housing 1010 facing the first lens barrel 1210, some of which are optical axis (Z axis) It may be provided long in the direction.

The plurality of third ball bearings 1215 are accommodated in the guide grooves 1014 and 1013 and fitted between the first lens barrel 1210 and the housing 1010 .

Some or all of the plurality of guide grooves 1214 and 1013 may be elongated in the optical axis (Z axis) direction. In addition, the cross-sections of the plurality of guide grooves 1214 and 1013 may have various shapes, such as a round shape or a polygonal shape.

Here, the first lens barrel 1210 is pressed toward the bottom of the housing 1010 so that the plurality of third ball bearings 1215 can maintain a contact state with the first lens barrel 1210 and the housing 1010 . To this end, a pulling yoke 1016 may be mounted on the bottom surface of the housing 1010 to face the pulling magnet 1216 mounted on the lower surface of the first lens barrel 1210 . The pulling yoke 1016 may be a magnetic material. Of course, a pulling magnet may be mounted on the bottom surface of the housing 1010 , and a pulling yoke may be mounted on the lower surface of the first lens barrel 1210 .

On the other hand, the coil 1241b for driving the first lens barrel 1210 is provided on one side of both sides of the housing 1010, and in this case, electromagnetic force acts on one side of the first lens barrel 1210. 1 For ease of driving the lens barrel 1210, the pulling magnet 1216 and the pulling yoke 1016 may be provided on one side from the center of the housing 1010, that is, the driving coil 1241b may be provided to be biased toward the position. . In addition, the first lens barrel 1210 has an extension portion 1219 in which the portion on which the magnet is mounted is extended to the side of the second lens barrel 1220 in the optical axis direction in order to increase the size of the magnet 1241a in order to improve the driving force. can be provided. Furthermore, in order to increase the size of the magnet 1243a in order to improve the driving force of the second lens barrel 1220 as well, the part on which the magnet is mounted extends to the side surface of the first lens barrel 1210 in the optical axis direction 1229. can be provided.

In addition, on the contrary, the coil 1243b for driving the second lens barrel 1220 is provided on the other side opposite to one side of both sides of the housing 1010, and in this case, electromagnetic force is applied to the second lens barrel 1220. Since it acts on the side, the pulling magnet 1226 and the pulling yoke 1017 may be provided to be biased toward the other side from the center of the housing 1010 for the ease of driving the second lens barrel 1220 .

Furthermore, the coil 1245b for driving the third lens barrel 1230 may also be provided on both sides or one side of the housing 1010, and when provided on only one side, the first and second lens barrels 1210 and 1220. Similarly, for the ease of driving the third lens barrel 1230 , the pulling magnet 1236 and the pulling yoke 1017 may be provided to be biased toward one side from the center of the housing 1010 . However, when the coil for driving the lens barrels 1210, 1220, and 1230 is provided on only one side of one side and the other side, and when the coil is provided on both sides, the pulling magnet and the pulling yoke are approximately at the center may be provided.

The second lens barrel 1220 is provided in the housing 1010 to be movable in the optical axis (Z axis) direction. For example, the second lens barrel 1220 may be disposed in front of the first lens barrel 1210 in parallel with the first lens barrel 1210 in the optical axis direction.

A plurality of fourth ball bearings 1225 are provided between the second lens barrel 1220 and the bottom surface of the housing 1010 , and the second lens barrel 1220 is attached to the housing 1010 by the fourth ball bearing 1225 . It can slide or roll about.

The plurality of fourth ball bearings 1225 has a rolling motion or sliding motion in the optical axis (Z axis) direction of the second lens barrel 1220 when a driving force is generated so that the second lens barrel 1220 moves in the optical axis (Z axis) direction. is designed to assist

A plurality of guide grooves 1224 and 1014 for accommodating the fourth ball bearing 1250, respectively, are formed on the bottom surface where the second lens barrel 1220 and the housing 1010 face each other, some of which are part of the optical axis (Z axis). ) may be provided long in the direction.

The plurality of fourth ball bearings 1225 are accommodated in the guide grooves 1224 and 1014 and are fitted between the second lens barrel 1220 and the housing 1010 .

Each of the plurality of guide grooves 1224 and 1014 may be formed to be elongated in the optical axis (Z axis) direction. In addition, the cross-sections of the plurality of guide grooves 1224 and 1014 may have various shapes, such as a round shape or a polygonal shape.

Here, the second lens barrel 1220 is pressed toward the bottom surface of the housing 1010 so that the plurality of fourth ball bearings 1225 can maintain contact with the second lens barrel 1220 and the housing 1010 .

To this end, a pulling yoke 1017 may be mounted on the bottom surface of the housing 1010 to face the pulling magnet 1226 mounted on the second lens barrel 1220 . The pulling yoke 1016 may be a magnetic material. Of course, the pulling magnet may be mounted on the bottom surface of the housing 1010 , and the pulling yoke may be mounted on the lower surface of the second lens barrel 1220 .

The third lens barrel 1230 is provided in the housing 1010 to be movable in the optical axis (Z axis) direction. For example, the third lens barrel 1230 may be disposed in front of the second lens barrel 1220 in parallel with the second lens barrel 1220 in the optical axis direction.

A plurality of fifth ball bearings 1235 are provided between the third lens barrel 1230 and the bottom surface of the housing 1010 , and the third lens barrel 1230 is attached to the housing 1010 by the fifth ball bearing 1235 . It can slide or roll about.

The plurality of fifth ball bearings 1235 have a rolling motion or sliding motion in the optical axis (Z axis) direction of the third lens barrel 1230 when a driving force is generated such that the third lens barrel 1230 moves in the optical axis (Z axis) direction. is designed to assist

A plurality of guide grooves 1234 and 1018 for accommodating the fifth ball bearing 1235, respectively, are formed on the bottom surface of the third lens barrel 1230 and the housing 1010 facing each other, some of which are formed on the optical axis (Z axis). ) may be provided long in the direction.

The plurality of fifth ball bearings 1235 are accommodated in the guide grooves 1234 and 1018 and are fitted between the third lens barrel 1230 and the housing 1010 .

Each of the plurality of guide grooves 1234 and 1015 may be elongated in the optical axis (Z axis) direction. In addition, the cross-sections of the plurality of guide grooves 1234 and 1015 may have various shapes, such as a round shape or a polygonal shape.

Here, the third lens barrel 1230 is pressed toward the bottom surface of the housing 1010 so that the plurality of fifth ball bearings 1235 can maintain a contact state with the third lens barrel 1230 and the housing 1010 .

To this end, a pulling yoke 1018 may be mounted on the bottom surface of the housing 1010 to face the pulling magnet 1236 mounted on the third lens barrel 1230 . The pulling yoke 1018 may be a magnetic material. Of course, a pulling magnet may be mounted on the bottom surface of the housing 1010 , and a pulling yoke may be mounted on the lower surface of the third lens barrel 1230 .

On the other hand, the guide grooves 1013 , 1014 , 1015 provided in the housing 1010 for guiding the movement of the third to fifth ball bearings 1215 , 1225 , 1235 are long grooves extending in the optical axis direction, respectively, or at least double The two may be interconnected guide grooves. When at least two of the three guide grooves 1013 , 1014 , and 1015 have a shape connected to each other, the first to third lens barrels 1210 , 1220 , and 1230 may be easily aligned in the optical axis direction.

In the drawings, guide grooves 1013 and 1014 provided in the movement paths of the first and second lens barrels 1210 and 1220 are provided as guide grooves connected to each other, and the third lens barrel 1230 is provided separately. presented as an example. Of course, the present invention is not limited thereto, and only the guide grooves 1014 and 1015 used for movement of the second and third lens barrels 1210 and 1220 are connected to each other, or all the guide grooves 1013, 1014 and 1015 are entirely It may be provided in a connected shape.

In addition, at least some of the guide grooves 1214 , 1224 , 1234 of the first to third lens barrels 1210 , 1220 , 1230 protrude toward the bottom of the housing 1010 on both sides in the optical axis direction to provide ball bearings 1215 and 1225 . , 1235) may be provided with separation prevention projections (1213, 1223, 1233) to prevent separation. The separation prevention protrusions 1213 , 1223 , and 1233 may be provided to correspond to the shape of the guide grooves 1013 , 1014 , 1015 provided in the housing 1010 , but the first to third lens barrels 1210 , 1220 . , 1230 when moving in the optical axis direction, the separation prevention projections 1213, 1223, 1233 may be provided to have a space apart so as not to contact the bottom of the guide grooves 1013, 1014, 1015.

Of course, the separation preventing protrusion is not limited to being provided on the first to third lens barrels 1210 , 1220 , and 1230 , and may be provided on the housing 1010 in the same principle.

Furthermore, referring to FIG. 13A , in the housing 1010 according to another embodiment of the present invention, the first and second lens barrels 1210 and 1220 are moved by different guide grooves 1013a, 1013b, 1014a, and 1014b, respectively. can make it happen In other words, the housing 1010 includes a total of four first guide grooves 1013a and 1013b and second guide grooves 1014a and 1014b that are separately provided, and the first lens barrel 1210 has a first guide groove. It is supported by the third ball bearing 1215 inserted into the grooves 1013a and 1013b, and the second lens barrel 1220 is supported by the fourth ball bearing 1225 inserted into the second guide grooves 1014a and 1014b and can move. have.

In this case, since the first lens barrel 1210 and the second lens barrel 1220 are arranged slightly staggered in a direction perpendicular to the optical axis direction, each of the extensions 1219 and 1229 can sufficiently move in the optical axis direction without interference. Zoom performance can be further improved.

The first to third lens barrels 1210, 1220, and 1230 according to this embodiment are sequentially provided in the optical axis direction, and the first and second lens barrels 1210 and 1220 each have a coil 1241b on one side or the other side, 1243b) and magnets 1241a and 1243a are provided. In addition, as shown in the third lens barrel 1230, a coil 1245b and a magnet 1245a may be provided on one side. In addition, the magnets 1241a, 1243a, 1245a provided in the first to third lens barrels 1210, 1220, and 1230 may be alternately arranged on one side and the other side in a zigzag manner to minimize mutual electromagnetic influence.

On the other hand, since the first and second lens barrels 1210 and 1220 according to the present embodiment move in the optical axis direction for zoom or autofocus in one space partitioned by the protruding wall 1009, they cannot be in contact with each other. In this case, it may not be possible to accurately control the position in the optical axis direction due to damage or excessive stroke.

Accordingly, in the present embodiment, the stopper 1060 may be provided to control the movement of the first and second lens barrels 1210 and 1220 , respectively. The stopper 1060 includes a first stopper 1061 for limiting the moving distance of the first lens barrel 1210 and a second stopper 1062 for limiting the moving distance of the second lens barrel 1220, The first stopper 1061 and the second stopper 1062 may be provided separately or may be interconnected.

The stopper 1060 includes a first stopper 1061 and a second stopper 1062 . In addition, the first frame 1061a and the second frame 1062a to be described below may be integrally connected to each other or may be separately provided. The first frame 1061a and the second frame 1062a are provided with damping materials 1061d and 1062d at portions facing the first and second lens barrels 1210 and 1220 to provide the first and second lens barrels 1210 , 1220) can absorb the shock of moving upwards.

The first stopper 1061 includes a first frame 1061a and a first extension portion 1061b extending in a direction perpendicular to the optical axis direction from the first frame 1061a and a first extension portion 1061b provided in the first extension portion 1061b. It includes a damping material 1061c. In addition, the first damping material 1061c is inserted into a hole provided in the first extension portion 1061b to protrude from both surfaces of the first extension portion 1061b, or to both surfaces of the first extension portion 1061b. It may be fixedly provided by bonding using an adhesive. In addition, the first frame 1061a is mounted on the side wall of the housing 1010 and the top of the wall of the other end so as to cover the upper part of one side on which the first extension part 1219 is provided in the first lens barrel 1210, The first extension 1061b and the first damping material 1061c are sandwiched between one side of the first lens barrel 1210 and the protruding wall 1009 . That is, the housing is provided with an insertion groove 1011 into which the first frame 1061a and the first extension 1061b are fitted. The insertion groove 1011 includes a first insertion groove 1011a provided along the inner side of the upper rim of the housing 1010 and a second insertion groove extending downward from one end of the first insertion groove 1011a perpendicular to the optical axis direction. (1011b). Then, the first frame 1061a is mounted on the first insertion groove 1011a, and the first extension portion 1061b is fitted into the second insertion groove 1011b. Of course, the first frame 1061a may be additionally fixed to the housing 1010 by bonding using an adhesive.

On the other hand, since the first extension portion 1061b and the first damping material 1061c extend from the upper portion of the extension portion 1229 of the second lens barrel 1220 to the lower portion, the second lens barrel 1220 is used to secure space. A second space portion 1221 that is a space secured so that the first extension portion 1061b and the first damping material 1061c extend may be provided above the extension portion 1229 of the .

Accordingly, the first lens barrel 1210 may be controlled to move only between the other end of the housing 1010 and the first damping material 1061c fitted in the front of the protruding wall 1009 .

The second stopper 1062 is provided in the second frame 1062a and the second extension portion 1062b and the second extension portion 1062b extending in a direction perpendicular to the optical axis direction in the second frame 1062a. It includes a damping material 1062c. In addition, the second damping material 1062c is inserted into a hole provided in the second extension portion 1062b to protrude from both surfaces of the second extension portion 1062b, or to both surfaces of the second extension portion 1062b. It may be fixedly provided by bonding using an adhesive. In addition, the second frame 1062a is mounted on the housing 1010 and the protruding wall 1009 so as to cover the upper portion of one side on which the second extension part 1229 is provided in the second lens barrel 1220, The second extension 1062b and the second damping material 1062c are sandwiched between the other side of the second lens barrel 1220 and the inner wall of the other side of the housing 1010 . That is, the housing is provided with an insertion groove 1012 into which the second frame 1062a and the second extension 1062b are fitted. The insertion groove 1012 includes a first insertion groove 1012a provided along the inner side of the upper rim of the housing 1010 and a second insertion groove extending downward from one end of the first insertion groove 1012a perpendicular to the optical axis direction. (1012b). Then, the second frame 1062a is mounted on the second insertion groove 1012a, and the second extension portion 1062b is fitted into the second insertion groove 1012b. Of course, the second frame 1062a may be additionally fixed to the housing 1010 by bonding using an adhesive.

On the other hand, since the second extension portion 1062b and the second damping material 1062c extend from the upper portion of the extension portion 1219 of the first lens barrel 1210 to the lower portion, the first lens barrel 1210 is used to secure space. A first space portion 1211 that is a space secured so that the second extension portion 1062b and the second damping material 1062c extend may be provided above the extension portion 1219 of the .

Accordingly, the second lens barrel 1220 may be controlled to move only between the protruding wall 1009 and the second damping material 1062c fitted in front of the other end of the housing 1010 .

Referring to FIG. 14 , a mechanism for guiding a position in which the third lens barrel 1230 is fixed to the housing 1010 according to the present embodiment is disclosed.

That is, the housing 1010 of the camera module according to the present embodiment is provided with a damper 1050 for damping the rotation holder 1100, and the damper 1050 is provided in the extension portion 1052 to protrude in both directions in the optical axis direction. A damping material 1053 is provided. In addition, the housing 1010 includes a protrusion wall 1009 protruding into the inner space to partition a space in which the first and second lens barrels are provided and a space in which the third lens barrel is provided.

Accordingly, the third lens barrel 1230 may be inserted into the housing 1010 such that one side thereof is supported by the damping material 1053 with the protruding wall 1009 as the assembly reference surface. Since the damping material 1053 has an elastic force, the third lens barrel 1230 can be sandwiched between the damping material 1053 and the protruding wall 1009 with a feeling of being slightly pressed. Alternatively, after the third lens barrel 1230 is first inserted into the housing, the damping material 1053 of the damper 1050 may be inserted to press the third lens barrel 1230 . In addition, an adhesive may be injected between the third lens barrel 1230 and the sidewall or bottom of the housing 1010 so that they are bonded to each other.

15 and 16 , another embodiment of a mechanism by which one of the zoom lenses is accurately fixed in a predetermined position according to an embodiment of the present invention is disclosed.

In this embodiment, since the third lens barrel 1230 is fixed to the housing 1010, a bearing required to move it may be unnecessary in principle. However, the present embodiment discloses a mechanism in which the third lens barrel 1230 is precisely disposed at a predetermined position of the housing 1010 using a ball bearing. Of course, after the third lens barrel 1230 is disposed in the housing 1010 , an adhesive may be injected between the third lens barrel 1230 and the sidewall or bottom of the housing 1010 to bond them to each other.

First, referring to FIG. 15 , the third lens barrel 1230 may be mounted with at least three ball bearings 1235 interposed between it and the bottom of the housing 1010 . Of course, guide grooves 1234 and 1015 into which the ball bearings are inserted are provided in portions where the third lens barrel 1230 and the housing 1010 face each other, and these guide grooves are individually provided for each ball bearing. can be

In addition, the third lens barrel 1230 into which each ball bearing 1235 is inserted and a pair of guide grooves provided in the housing 1010 may be provided in the same shape as each other (the ball bearing is the third lens barrel ( 1230) and the guide grooves of the housing 1010 are all in point contact), the third lens barrel 1230 or the three guide grooves provided in the housing 1010 have the shapes disclosed in the enlarged view of FIG. 15 (①②③), respectively. ) can be provided. First, ① is a guide groove in the shape of a triangular pyramid in which all the corners are cut, and the ball bearing 1235 contacts only three surfaces marked with dots, and the optical axis direction (Z axis) of the third lens barrel 1230, the optical axis Both the X-axis direction perpendicular to and the optical axis and the Y-axis direction perpendicular to the X-axis can be constrained, and ② can be viewed as having a 'V'-shaped groove (the bottom can be cut through) in the optical axis direction. The bearing 1235 contacts only the two surfaces marked with dots, and can constrain the X-axis and Y-axis directions of the third lens barrel 1230, and ③ is a ball bearing ( 1235 may contact only the floor, which is one surface with dots, and may constrain the Y-axis direction of the third lens barrel 1230 . After all, since the X, Y, and Z-axis directions of the third lens barrel 1230 can all be constrained by the ①②③ conditions, the ball bearing 1235 inserted into the guide grooves 1234 and 1015 for the third lens barrel 1230 The third lens barrel 1230 can be precisely positioned by simply arranging it in the housing 1010 with the .

Next, referring to FIG. 16 , the third lens barrel 1230 may be mounted with at least three ball bearings 1235 interposed between it and the bottom of the housing 1010 . Of course, guide grooves 1234 and 1015 into which the ball bearings are inserted are provided in portions where the third lens barrel 1230 and the housing 1010 face each other, and these guide grooves are individually provided for each ball bearing. can be

In addition, one of the three guide grooves provided in the third lens barrel 1230 and the housing 1010 into which each ball bearing 1235 is inserted is provided differently, and the other two have the same shape. can be provided. That is, in ① among the three below, a pair of side brick protrusions P protrude from one side and be inserted from the other side, so guide grooves of different shapes should be provided.

Each of the three guide grooves provided in the third lens barrel 1230 or the housing 1010 may be provided in the shape (①②③) shown in the enlarged view of FIG. 16 . First, ① is a shape including a 'V' groove (the bottom can be cut out) and a side wall protrusion (P) protruding on both sides of the third lens barrel 1230 or the housing 1010, and the other One may be in the shape of a 'V' groove (the bottom can be cut out), and the ball bearing 1235 is in contact with four surfaces marked with dots in one guide groove and the side wall 2 of the 'V' groove in the other guide groove. It can only contact dogs, and according to this, the optical axis direction (Z axis) of the third lens barrel 1230, the X axis direction perpendicular to the optical axis, and the optical axis and the Y axis direction perpendicular to the X axis can all be constrained, ② is as having a 'V'-shaped groove long in the optical axis direction, and the ball bearing 1235 contacts only the two surfaces marked with dots, and can constrain the X-axis and Y-axis directions of the third lens barrel 1230, and , ③ are long in the optical axis direction and are provided so that the bottom is flat, and the ball bearing 1235 contacts only the bottom, which is one surface with dots, and may constrain the Y-axis direction of the third lens barrel 1230 . As a result, all of the X, Y, and Z-axis directions of the third lens barrel 1230 can be constrained by the ①②③ conditions, so that the third lens barrel 1230 is inserted into the guide grooves 1234 and 1015. The ball bearing 1235 is inserted into the guide grooves 1234 and 1015. The third lens barrel 1230 can be precisely positioned by simply arranging it in the housing 1010 with the .

17A to 21B are views showing the positional relationship between a magnet and four Hall sensors provided in a lens barrel according to an embodiment of the present invention, and four Hall sensors according to the movement of the lens barrel according to their positional relationship; It is a graph showing the sensed value. In other words, FIGS. 17A to 21B show a lens barrel moving in the optical axis (Z axis) direction, for example, the optical axis direction movement of the lens barrel according to the arrangement of Hall sensors of various embodiments provided to face the first or second lens barrel. It is a graph showing the individual sensing values of the Hall sensors and the sum of all sensing values.

First, referring to FIG. 17A , the lens barrel moving in the optical axis direction, for example, the first or second lens barrels 1210 and 1220 may move a considerable distance in the optical axis direction to perform a zoom or autofocus function. The Hall sensor 1241c or 1243c should be able to sense the position according to the distance movement as accurately as possible.

Accordingly, in this embodiment, a plurality of position detection sensors, for example, a hall sensor 1241c or 1243c provided to face the magnets 1241a or 1243a provided in the first or second lens barrels 1210 and 1220, may be provided. can More specifically, it may be provided with a position detection sensor consisting of four sets, for example, a Hall sensor (1241c or 1243c).

In this embodiment, the magnet may be used for driving the lens barrel or separately provided on the lens barrel or the like for position sensing regardless of driving. Hereinafter, also in the position sensing structure of the lens barrel according to another embodiment The magnet may be a magnet for driving the lens barrel or a magnet installed for position sensing regardless of driving.

In this embodiment, the magnet 1241a or 1243a is provided to have an N pole and an S pole in a direction parallel to the optical axis, which is the movement direction of the first or second lens barrels 1210 and 1220 . That is, the magnets 1241a or 1243a are magnetized as a two-pole magnet to have an N pole and an S pole in the optical axis direction (in this case, a 'neutral region' is provided between the N pole and the S pole), or each one pole Two individual magnets having an N pole and an S pole on the surface opposite to the coil 1241b or 1243b may be sequentially disposed in the optical axis direction (in this case, the N pole and the S pole are in close contact, or the interval to have a 'interval' between the N pole and the S pole). Accordingly, in all embodiments of the present specification, the term 'interval region' is also used as a term including both 'neutral region' and 'interval'.

In addition, the magnet 1241a or 1243a may be provided to face one coil 1241b or 1243b.

In this case, for example, two Hall sensors (Hall 1 to Hall 4, 1241c) facing the N pole and S pole of the magnet 1241a or 1243a in a non-driving state in which power is not applied to the coil 1241b or 1243b, respectively. or 1243c), and the four Hall sensors may be disposed side by side in the moving direction of the magnet 1241a or 1243a inside the winding of the coil 1241b or 1243b. In detail, the four Hall sensors may be spaced apart by the same distance, or Hall sensors (Hall 1 to Hall 4) disposed at the N pole and the S pole centering on the neutral region or the interval of the magnet may be provided symmetrically. have.

In this structure, the magnet 1241a or 1243a and the four Hall sensors 1241c and 1243c are disposed, and when the magnet 1241a or 1243a moves in both directions (+ or - direction) at the corresponding position, as shown in FIG. 17b Likewise, the four Hall sensors (Hall 1 to Hall 4) have their respective sensing values according to the position of each magnet, and by summing them up (Hall 1 + Hall 2 + Hall 3 + Hall 4), the total Hall sensing value (Hall Signal) ) increases and decreases approximately in proportion to the movement of the magnet. In addition, the total hall sensing values summed within the movement range of the magnet may all have different values. In other words, it can be seen that the 'Hall Signal' value in FIG. 17B has different values within the range of -2 to 2 mm.

As a result, it is difficult to sense the position of the magnet according to the movement of a long distance with one or a small number of Hall sensors. It can be seen that this is possible.

On the other hand, referring to FIGS. 18A and 19A , another embodiment in which only the number of Hall sensors is changed in the positional relationship shown in FIG. 17A is disclosed, and with reference to FIGS. 18B and 19B , the total halls sensed and summed by them It can be seen that the sensing value (Hall Signal) increases or decreases in approximately proportional to the movement of the magnet.

Here, in the non-driven state in which power is not applied to the coil 1241b or 1243b, the magnet 1241a or 1243a and the coil 1241b or 1243b may face each other's center, and the magnet 1241a or 1243a may have an N pole and The length of the S pole in the optical axis direction may be approximately the same.

In another embodiment of FIGS. 18A and 19A , a Hall sensor 1241c or 1243c is disposed inside the winding coil 1241b or 1243b, and the number of Hall sensors can be differentiated from that shown in FIG. 17A .

That is, a plurality of position detection sensors (Hall sensors, 1241c or 1243c) provided opposite to the magnets 1241a or 1243a provided in the lens barrel movable in the optical axis direction, for example, the first or second lens barrel 1210 or 1220. ), for example, may be provided with a position sensor 1241c or 1243c consisting of a set of three (FIG. 18A) or five (FIG. 19A). In another embodiment, the magnet 1241a or 1243a is provided to have an N pole and an S pole in a direction parallel to the optical axis, which is the movement direction of the first or second lens barrels 1210 and 1220 . That is, the magnets 1241a or 1243a are magnetized as a two-pole magnet to have an N pole and an S pole in the optical axis direction (in this case, a 'neutral region' is provided between the N pole and the S pole), or each one pole Two individual magnets having an N pole and an S pole on the surface opposite to the coil 1241b or 1243b may be sequentially disposed in the optical axis direction (in this case, the N pole and the S pole are in close contact, or the interval to have a 'interval' between the N pole and the S pole).

In addition, the magnet 1241a or 1243a may face one coil 1241b or 1243b. In this case, it may be provided with a position sensor (Hall sensor) respectively opposed to the N pole, S pole, and the neutral region (or 'interval') of the magnet 1241a or 1243a.

For example, the embodiment disclosed in FIG. 18A includes three position detection sensors (Hall sensors, Hall 1 to Hall 3, 1241c or 1243c), and the three Hall sensors are magnets 1241a inside the winding of the coil 1241b or 1243b. Alternatively, 1243a) may be arranged side by side in the moving direction. In detail, the three Hall sensors may be spaced apart by the same distance, or the three Hall sensors (Hall 1 to Hall 3) are respectively opposed to the N pole, the neutral region (or 'interval') and the S pole of the magnet. can be provided.

In addition, the embodiment disclosed in FIG. 19A includes five position detection sensors (Hall sensors, Hall 1 to Hall 5, 1241c or 1243c), and the five Hall sensors are magnets 1241a inside the winding of the coil 1241b or 1243b. Alternatively, 1243a) may be arranged side by side in the moving direction. In detail, the five Hall sensors can be spaced apart by the same distance, for example, the N pole of the magnet, the neutral region (or 'interval') and Hall sensors (Hall 1 to Hall 5) facing each of the S poles may be provided, for example, two Hall sensors (Hall 1, Hall 2) facing the N poles, a neutral region (or 'interval') One Hall sensor (Hall 3) facing the pole and two Hall sensors (Hall 4, Hall 5) facing the S pole may be provided.

In this structure, the magnet 1241a or 1243a and three or five Hall sensors 1241c and 1243c are disposed, and when the magnet 1241a or 1243a moves in both directions (+ or - direction) at the corresponding position, FIG. 18b ( 3 Hall sensors) or as shown in FIG. 19b (5 Hall sensors), 3 or 5 Hall sensors have respective sensing values according to the position of each magnet, and summing them {(Hall 1 + Hall 2) + Hall 3) or (Hall 1 + Hall 2 + Hall 3 + Hall 4 + Hall 5)}, it can be seen that the total hall sensing value (Hall Signal) increases or decreases in approximately proportion to the movement of the magnet.

In addition, the total hall sensing values summed within the movement range of the magnet may all have different values. In other words, it can be seen that the 'Hall Signal' values in FIGS. 18B and 19B all have different values within the range of -2 to 2 mm.

As a result, it is difficult to sense the position of the magnet according to the movement of a long distance with one Hall sensor, but a combination of an even number (eg, FIG. 17A ) or an odd number (eg, FIGS. 18A and 19A ) of two or more Hall sensors It can be seen that almost accurate position sensing is possible even if the magnet moves a long distance. Here, in the non-driven state in which power is not applied to the coil 1241b or 1243b, the magnet 1241a or 1243a and the coil 1241b or 1243b may face each other's center, and the magnet 1241a or 1243a may have an N pole and The length of the S pole in the optical axis direction may be approximately the same.

Next, referring to FIG. 20A or FIG. 21A , the lens barrel moving in the optical axis direction, for example, the first or second lens barrels 1210 and 1220 may move a considerable distance in the optical axis direction to perform a zoom or autofocus function. It should be possible, and the position sensor (Hall sensor, 1241c or 1243c) should be able to sense the position according to this distance movement as accurately as possible.

Accordingly, in this embodiment, a plurality of, for example, a hall sensor provided in a set of 4 or 6 to face the magnets 1241a or 1243a provided in the lens barrel, for example, the first or second lens barrels 1210 and 1220 (1241c or 1243c).

The magnet of this embodiment may be used for driving the lens barrel, or may be separately provided on the lens barrel for position sensing of the lens barrel.

In this embodiment, the magnets 1241a and 1243a may have a configuration in which N poles and S poles are alternately disposed in a direction parallel to the optical axis direction, which is the movement direction of the first or second lens barrels 1210 and 1220 . In other words, the magnet may be provided to have at least (N pole, S pole, N pole) or (S pole, N pole, S pole) in the optical axis direction. That is, the magnet 1241a or 1243a is magnetized with three or more magnets to have an N pole and an S pole in the optical axis direction (in this case, a 'neutral region' is provided between the N pole and the S pole), or each 1 At least three individual magnets having an N pole and an S pole on the surface opposite to the coil 1241b or 1243b by being polarized may be sequentially arranged in the optical axis direction (in this case, the N pole and the S pole are in close contact, A gap is provided to provide a 'interval' between the N pole and the S pole).

In addition, the magnets 1241a or 1243a are provided to face the coils 1241b or 1243b provided in sets of two (that is, at least two coils opposing the magnet). Here, the two coils 1241b or 1243b may be disposed to face the center of a pole that is magnetized with the same polarity on both sides.

And, each of two or three Hall sensors (Hall 1 to Hall 4 or Hall 1 to Hall 6, 1241c or 1243c) facing the two N poles or S poles on both sides of the magnets 1241a or 1243a are provided. can do.

In other words, as shown in FIG. 20A , for example, in a non-driving state in which power is not applied to the coil 1241b or 1243b, when the four Hall sensors Hall 1 to Hall 4 are provided, the S pole is interposed therebetween. A total of four Hall sensors, two at the left and right ends of the two N-poles provided on both sides, may be disposed to face the magnets.

In addition, in the case of having six Hall sensors (Hall 1 to Hall 6) as shown in FIG. 21a, two at the left and right ends of two N poles provided on both sides with an S pole therebetween, and one in between, A total of 6 Hall sensors may be disposed, 3 each.

In addition, the Hall sensors (Hall 1 to Hall 4 or Hall 1 to Hall 6, 1241c or 1243c) may be disposed at the same distance between sets opposite to the same polarity at different positions of the driving magnets 1241a or 1243a. That is, as shown in FIG. 20A or FIG. 21A , the arrangement shape of the Hall sensors disposed inside the left and right driving coils 1241b or 1243b may be substantially the same.

In this structure, the magnet (1241a or 1243a) and four or six Hall sensors (1241c, 1243c) are disposed, and when the magnet (1241a or 1243a) moves in both directions (+ or - direction) at the corresponding position, FIG. 20b or As shown in FIG. 21b, four or six Hall sensors (Hall 1 to Hall 4 or Hall 1 to Hall 6) have respective sensing values according to the position of each magnet, and subtract some by summing them, for example, If the sum of the sensing values of all Hall sensors opposing one polarity of the magnet 1241a or 1243a is subtracted from the sum of the sensing values of all Hall sensors facing the other polarity - that is, {(Hall 1 + Hall 2) - (Hall 3 + Hall 4)} or {(Hall 1 + Hall 2 + Hall 3) - (Hall 4 + Hall 5 + Hall 6)} It can be seen that it increases and decreases proportionally. In addition, all Hall sensing values calculated within the movement range of the magnet may have different values. In other words, it can be seen that the 'Hall Signal' values in FIGS. 20B and 21B all have different values within the range of -2 to 2 mm.

As a result, it is difficult to sense the position of the magnet according to the movement of a long distance with one Hall sensor, but it can be seen that almost accurate position sensing is possible even if the magnet moves a long distance by using four or six Hall sensors. Of course, the number of Hall sensors is not limited thereto, and it is applicable when two or more Hall sensors are arranged to face the same polarity on both sides of the 3-pole magnet. Here, power is not applied to the coil 1241b or 1243b. In the non-driven state, the magnet 1241a or 1243a and the coil 1241b or 1243b may face each other with the center, and the magnet 1241a or 1243a may be formed of at least two N poles (or S poles) facing the Hall sensor. The optical axis direction length may be approximately the same.

22 is a perspective view illustrating a main board and coils and components mounted thereon according to an embodiment of the present invention.

Referring to FIG. 22 , the main board 1070 according to an embodiment of the present invention includes coils 1141b, 1143b, and 1145b for driving the reflective module 1100 of the first driving unit 1140, and a second driving unit ( A plurality of coils 1241b, 1243b, and 1245b for driving the lens module 1200 of 1240 may be mounted on the inner surface. In addition, components 1078 such as various passive elements and active elements, a gyro sensor 1079, and the like may be mounted on the outer surface. Accordingly, the main substrate 1070 may be a double-sided substrate.

Specifically, it includes a first side substrate 1071 and a second side substrate 1072 arranged in approximately parallel, and a bottom substrate 1073 interconnecting the first side substrate 1071 and the second side substrate 1072. and a terminal unit 1074 for connecting an external power source and a signal may be connected to any one of the first side substrate 1071 , the second side substrate 1072 , and the bottom substrate 1073 .

On the first side substrate 1071 , some of the plurality of coils of the first driving unit 1140 for driving the reflective module 1100 ( 1143b in the figure), a sensor 1143c , and a lens module 1200 ) Some of the plurality of coils of the second driving unit 1240 for driving ( 1241b in the drawing) and the sensor 1241c may be mounted.

On the second side substrate 1072 , some of the plurality of coils of the first driving unit 1140 for driving the reflective module 1100 ( 1145b in the figure) and a second driving unit for driving the lens module 1200 . Some of the plurality of coils 1240 ( 1243b and 1245b in the drawing) and sensors 1243c and 1245c may be mounted.

A coil 1141b for driving the reflection module 1100 of the first driving unit 1140 and a sensor 1141c for sensing the position of the reflection module 1100 may be mounted on the bottom substrate 1073 .

In the drawings, it is shown that various passive elements, active elements, etc. components 1078, gyro sensors 1079, etc. are mounted on the first side substrate 1071, but these are mounted on the second side substrate 1072. It may be mounted, or may be appropriately divided and mounted on the first side substrate 1071 and the second side substrate 1072 .

In addition, a plurality of coils 1141b, 1143b, 1145b, 1241b, 1243b, 1245b and position sensing sensors 1141c and 1143c mounted on the first side substrate 1071, the second side substrate 1072, and the bottom substrate 1073 , 1241c, 1243c, 1245c) may be variously distributed and mounted on each board according to the design of the camera module.

23 is a perspective view of a portable electronic device according to another embodiment of the present invention.

Referring to FIG. 23 , the portable electronic device 2 according to another embodiment of the present invention may be a portable electronic device such as a mobile communication terminal equipped with a plurality of camera modules 500 and 1000, a smart phone, and a tablet PC. have.

In the present embodiment, a plurality of camera modules 500 and 1000 may be mounted on the portable electronic device 2 .

At least one camera module among the plurality of camera modules 500 and 1000 may be the camera module 1000 according to the embodiment of the present invention described with reference to FIGS. 2 to 16 .

That is, in the case of a portable electronic device having a dual camera module, at least one of the two camera modules may be provided as the camera module 1000 according to an embodiment of the present invention.

Through this embodiment, the camera module and the portable electronic device including the same according to an embodiment of the present invention have a simple structure and reduce the size while implementing functions such as auto focus adjustment, zoom, and hand shake correction. In addition, power consumption can be minimized.

In the above, the configuration and features of the present invention have been described based on the embodiments according to the present invention, but the present invention is not limited thereto, and it is understood that various changes or modifications can be made within the spirit and scope of the present invention. It is intended that such changes or modifications will be apparent to those skilled in the art, and therefore fall within the scope of the appended claims.

1, 2: Portable electronic devices
1000: camera module
1010: housing
1100: reflection module
1110: reflective member
1120: rotation holder
1050: damper
1060: stopper
1140: first driving unit
1200: lens module
1210: first lens barrel
1220: second lens barrel
1230: third lens barrel
1240: second driving unit
1300: image sensor module

Claims (13)

housing;
a plurality of lens modules movably disposed along an optical axis inside the housing;
an optical path changing member for changing the traveling direction of the incident light to the optical axis direction; and
a driving unit configured to move at least one lens module among the plurality of lens modules along the optical axis;
The driving unit includes at least one magnet and at least one coil facing the at least one magnet,
The at least one lens module includes an extension portion extending to face another lens module among the plurality of lens modules in a direction perpendicular to the optical axis, and the at least one magnet is at least partially disposed in the extension portion,
camera module. In claim 1,
The driving unit includes a plurality of position sensors configured to sense a position on the optical axis of the at least one lens module and located inside the at least one coil,
camera module. In claim 2,
The plurality of position sensors are arranged in the optical axis direction,
camera module. In claim 1,
at least one guide groove disposed on the at least one lens module; and
At least one ball bearing at least partially accommodated in the at least one guide groove; further comprising
camera module. In claim 4,
The at least one guide groove extends in the optical axis direction,
camera module. In claim 4,
The at least one guide groove includes a first guide groove disposed on one surface of the at least one lens module and a second guide groove disposed on the one surface and extending in parallel with the first guide groove,
camera module. In claim 1,
Further comprising a pulling yoke disposed on one of the at least one lens module or the housing,
The at least one magnet includes a pulling magnet disposed on the other one of the at least one lens module or the housing, wherein the pulling magnet faces the pulling yoke in a direction perpendicular to the optical axis,
camera module. In claim 1,
The at least one magnet is disposed opposite to the side of the housing,
camera module. In claim 1,
The at least one lens module includes a first lens module and a second lens module,
The first lens module includes a first extension portion extending to face the side surface of the second lens module, the second lens module includes a second extension portion extending to face the side surface of the first lens module,
The second extension is disposed opposite to the first extension with the optical axis interposed therebetween,
camera module. In claim 9,
The driving unit includes a first driving unit configured to drive the first lens module and a second driving unit configured to drive the second lens module,
The at least one magnet comprises a first magnet coupled to the first extension as a part of the first driving part, and a second magnet coupled to the second extension as a part of the second driving part,
camera module. In claim 9,
One of the first lens module and the second lens module is configured to be in charge of an autofocus (AF) function, and the other one is configured to be in charge of a zoom function. In claim 1,
wherein the housing includes a hole configured to receive the at least one coil;
camera module. In claim 1,
The at least one magnet is a camera module magnetized to have an N pole, a neutral region, and an S pole along the optical axis direction.

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